Restore Full Electronic Functionality to Your GM Vehicle
Is your Chevrolet Caprice, Impala, or Express van experiencing bizarre electrical problems? Issues like flickering lights, malfunctioning power windows and locks, or a security system that acts on its own are often signs of a failing Body Control Module (BCM). The BCM is the central command center for your vehicle’s body electronics, and when it fails, it can cause a wide range of frustrating and difficult-to-diagnose symptoms. This replacement Body Control Module, part number 15872421, is the reliable solution to restore your vehicle’s proper operation.
Common Failure Symptoms
- ✔ Erratic or non-functional interior and exterior lights (headlights, dome lights, dash lights).
- ✔ Power windows, door locks, or mirrors operating intermittently or not at all.
- ✔ Vehicle security system engaging randomly or preventing the car from starting.
- ✔ Horn honking unexpectedly or not working when pressed.
- ✔ False warning lights appearing on the instrument cluster (e.g., ‘Service Theft System’).
- ✔ Wipers activating on their own or not responding to the switch.
- ✔ Communication issues with other vehicle modules, leading to various system malfunctions.
Solving Issues with a 2011-2013 Caprice BCM
Don’t let a faulty module compromise your vehicle’s safety and convenience. This unit is a direct-fit replacement for a wide range of GM vehicles. We make the process simple: upon purchase, you provide us with your vehicle’s VIN. We then program the module with the latest GM software specific to your car’s configuration. This ensures that when the part arrives, it’s ready for installation without the need for an expensive trip to the dealership for programming. This is the most efficient way to get your car back to 100%.
Installation and Post-Install Procedures
While installation is straightforward for many DIY mechanics, some vehicles may require additional steps after the new BCM is connected. Please be aware of the following potential procedures:
- Airbag System Sync: If the airbag warning light illuminates after installation, a professional scan tool is needed to perform the ‘Setup SDM Primary Key in BCM’ procedure. This syncs the new BCM with the airbag system.
- Brake Pedal Position Relearn: Some models may require a brake pedal position sensor recalibration to ensure correct brake light and traction control operation.
Always consult a factory service manual or a qualified technician for guidance specific to your vehicle.
This BCM is a direct replacement for the following part numbers:
10382479, 15093910, 15276271, 15299986, 15819552, 15828601, 15837419, 15872388, 15872421, 15880684, 15921352, 15921353, 15948438, 15948439, 20815898, 20839063, 20864767, 20864768, 20921435, 20921436, 20935349, 22860591, 25826124, 25826125, 25847588, 25847589, 25892622, 25910474, 25934762, 25934763, 95151084
Frequently Asked Questions
What does a Body Control Module (BCM) do?
The BCM acts as the central computer for your vehicle’s body electronics. It controls non-engine related functions like power windows, locks, lights, wipers, security systems, and more.
Is this BCM difficult to install?
The physical replacement is typically simple, involving unplugging the old module and plugging in the new one. However, some models may require post-installation procedures like an airbag system sync or brake pedal position relearn, which may require a professional scan tool.
Do I need to send my old BCM back?
No, there is no core charge for this part. You can keep your original module.
How do I provide my VIN for programming?
After you complete your purchase, we will contact you for your vehicle’s 17-digit VIN. We cannot ship the module until we have this information to program it correctly for your specific vehicle.
What happens if the airbag light is on after installation?
This indicates the new BCM needs to be synced with the airbag system (SDM). A procedure called ‘Setup SDM Primary Key in BCM’ must be performed with a compatible professional diagnostic tool to resolve this.
Will this fit other GM vehicles besides the 2011-2013 Caprice?
Yes, this BCM fits a very wide range of GM cars, trucks, and vans, including the Impala, Tahoe, Express, Acadia, and more. Please check the detailed fitment list on this page and match your original part number to ensure compatibility.